diff --git a/code/game/gamemodes/malfunction/Malf_Modules.dm b/code/game/gamemodes/malfunction/Malf_Modules.dm
index ec4d155e8d0..b25eb450dd1 100644
--- a/code/game/gamemodes/malfunction/Malf_Modules.dm
+++ b/code/game/gamemodes/malfunction/Malf_Modules.dm
@@ -53,6 +53,80 @@
 		turret.shot_delay = 20
 	src << "<span class='notice'>Turrets upgraded.</span>"
 
+/datum/AI_Module/large/lockdown
+	module_name = "Hostile Station Lockdown"
+	mod_pick_name = "lockdown"
+	description = "Take control of the airlock, blast door and fire control networks, locking them down. Caution! This command also electrifies all airlocks."
+	cost = 20
+	one_time = 1
+
+	power_type = /mob/living/silicon/ai/proc/lockdown
+
+/mob/living/silicon/ai/proc/lockdown()
+	set category = "Malfunction"
+	set name = "Initiate Hostile Lockdown"
+
+	if(src.stat == 2)
+		src <<"You cannot begin a lockdown because you are dead!"
+		return
+
+	if(malf_cooldown)
+		return
+
+	var/obj/machinery/door/airlock/AL
+	for(var/obj/machinery/door/D in portals)
+		spawn()
+			if(istype(D, /obj/machinery/door/airlock))
+				AL = D
+				if(AL.canAIControl() && !AL.stat) //Must be powered and have working AI wire.
+					AL.locked = 0 //For airlocks that were bolted open.
+					AL.safe = 0 //DOOR CRUSH
+					AL.close()
+					AL.locked = 1 //Bolt it!
+					AL.lights = 0 //Stealth bolt for a classic AI door trap.
+					AL.secondsElectrified = -1  //Shock it!
+			else if(!D.stat) //So that only powered doors are closed.
+				D.close() //Close ALL the doors!
+
+	var/obj/machinery/computer/communications/C = locate() in machines
+	if(C)
+		C.post_status("alert", "lockdown")
+
+	src.verbs += /mob/living/silicon/ai/proc/disablelockdown
+	src << "<span class = 'warning'>Lockdown Initiated.</span>"
+	malf_cooldown = 1
+	spawn(30)
+	malf_cooldown = 0
+
+/mob/living/silicon/ai/proc/disablelockdown()
+	set category = "Malfunction"
+	set name = "Disable Lockdown"
+
+	if(src.stat == 2)
+		src <<"You cannot disable lockdown because you are dead!"
+		return
+	if(malf_cooldown)
+		return
+
+	var/obj/machinery/door/airlock/AL
+	for(var/obj/machinery/door/D in portals)
+		spawn()
+			if(istype(D, /obj/machinery/door/airlock))
+				AL = D
+				if(AL.canAIControl() && !AL.stat) //Must be powered and have working AI wire.
+					AL.locked = 0
+					AL.secondsElectrified = 0
+					AL.open()
+					AL.safe = 1
+					AL.lights = 1 //Essentially reset the airlock to normal.
+			else if(!D.stat) //Opens only powered doors.
+				D.open() //Open everything!
+
+	src << "<span class = 'notice'>Lockdown Lifted.</span>"
+	malf_cooldown = 1
+	spawn(30)
+	malf_cooldown = 0
+
 /datum/AI_Module/large/disable_rcd
 	module_name = "RCD disable"
 	mod_pick_name = "rcd"
diff --git a/code/game/machinery/doors/door.dm b/code/game/machinery/doors/door.dm
index 352231c2116..eab30d6f2f5 100644
--- a/code/game/machinery/doors/door.dm
+++ b/code/game/machinery/doors/door.dm
@@ -27,6 +27,7 @@
 		explosion_resistance = 0
 	update_freelook_sight()
 	air_update_turf(1)
+	portals += src
 	return
 
 
@@ -34,6 +35,7 @@
 	density = 0
 	air_update_turf(1)
 	update_freelook_sight()
+	portals -= src
 	..()
 	return
 
diff --git a/code/modules/mob/living/silicon/ai/ai.dm b/code/modules/mob/living/silicon/ai/ai.dm
index 8036721f0cc..f32dba73748 100644
--- a/code/modules/mob/living/silicon/ai/ai.dm
+++ b/code/modules/mob/living/silicon/ai/ai.dm
@@ -39,6 +39,7 @@ var/list/ai_list = list()
 
 	var/control_disabled = 0 // Set to 1 to stop AI from interacting via Click()
 	var/malfhacking = 0 // More or less a copy of the above var, so that malf AIs can hack and still get new cyborgs -- NeoFite
+	var/malf_cooldown = 0 //Cooldown var for malf modules
 
 	var/obj/machinery/power/apc/malfhack = null
 	var/explosive = 0 //does the AI explode when it dies?